Improvement in chimney-cowls



F. W. MASCHEB.

himney-Cowls.

No.149,769 PatentedApri|14,1874.

FRIEDRICH W. MASCHER, OF HARRISBURG, PENNSYLVANIA.

IMPROVEMENT IN CHINlNEY-'COWLS.

Specification forming part of Letters Patent No. 149,769, dated April14, 1874;v application tiled March 17, 1874.

` tional view.

My invention relates to that class of chimney cowls or caps which areintended to turn, in order to keep the opening for the escape of thesmoke to the leeward, or on the side opposite that from which the windblows. l\'ly invention consists in constructing the spindle in such amanner that the wear and tear caused by the revolution of the cap willnot make it liable to bind on either side, and so prevent it fromturning, and defeat the very object of the revolving cowl. v

In the drawings, A represents the chimney, into which the cowl is placedand securely `fastened and tightened by mortar. Upon thetop of thechimney A is a metallic plate, B, entirely covering the top of thechimney around the cap, and excluding the wet and wind. From the plate Bdrops a flange, b, exactly fitting the mouth of the chimney, whether itbe round, oblong, or square, and holding the plate B firmly in place.From the inner edge of the plate B rises the cylindrical flange U, whichcompletes and secures the joint around which the cap revolves. From oneside of the liange C to the other, at the bottom, is a crbss piece, c,into the center ot' which is lirmly secured the spindle s, and, a shortdistance above the cross-piece c, is another cross-piece, c',

crossing the cylindrical iiange C atright angles, and which supports andbraces the spindle s in an upright position. Fivoted upon the spindle sis the cap D. An inverted tube, e, is secured upon a rod, g, runningthrough y the center of the upright portion of the cap D, which tube is'placed over the spindle s, its

bottoni resting upon the apex of the spindle.

The tube and rod are rmly xed in the top of the cap D, and the top ofthe rod g supports a vane rigidly secured thereto, by which the cap isassisted in keeping with the wind. The horizontal part of the cap D ismade long enough to keep the sun and rain from entering the verticalportion of the cap. The cap is kept from rising by a ilange, o, upon itslower edge, which is kept down by dogs m, screwed upon the plate B.

The operation of my device is as follows: After securing the plate B,with its llanges b and C, and spindle s, rmly to the top of a chimney,the cap D is placed upon it, the invertedtube being placed over thespindle s, and the dogs m screwed down over the tlange o.

The new and useful advantages arising from it are, that the length ofthe tube and spindle will insure a steady and uniform motion to the cap,it not being liable to wear out of true, or bind upon the stationaryparts of the device,

and thus become useless as a revolving cap;

and, secondly, thel shape of the cap, being a right-angled elbow of apipe, is peculiarly adapted to prevent the rain and snow from enteringthe chimney, and also prevent the sun from shining in the chimney, whichis said to materially lessen the draft; and, thirdly, the spindle uponthe chimney, entering the inverted tube of the cap, prevents soot, dust,or other dirt from accumulating at the point ot' contact and inducingwear or rust. 1 Having fully described my invention, what I' claim asnew, and desire to secure by Letters Patent, isv The plate B, flange C,and spindle s, in combination with the right-angled elbow-cap, tube e,rod g, and vane, substantially as described.

'Ihe above specification of said invention signed and witnessed, atHarrisburg, this 16th day of March, A. D. 1874.

FRIEDRICH WM.

MASGHER.

